[dpdk-stable] patch 'net/hns3: fix rollback after setting PVID failure' has been queued to stable release 19.11.9

[Christian Ehrhardt]

Hi,

FYI, your patch has been queued to stable release 19.11.9

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 05/19/21. So please
shout if anyone has objections.

Also note that after the patch there's a diff of the upstream commit vs the
patch applied to the branch. This will indicate if there was any rebasing
needed to apply to the stable branch. If there were code changes for rebasing
(ie: not only metadata diffs), please double check that the rebase was
correctly done.

Queued patches are on a temporary branch at:
https://github.com/cpaelzer/dpdk-stable-queue

This queued commit can be viewed at:
https://github.com/cpaelzer/dpdk-stable-queue/commit/979db7ce12639af4a83d881360e019294594e06f

Thanks.

Christian Ehrhardt <christian.ehrhardt at canonical.com>

---
>From 979db7ce12639af4a83d881360e019294594e06f Mon Sep 17 00:00:00 2001
From: Chengchang Tang <tangchengchang at huawei.com>
Date: Wed, 31 Mar 2021 18:01:38 +0800
Subject: [PATCH] net/hns3: fix rollback after setting PVID failure

[ upstream commit 39c4fe7042acaeea7a4dff0213ed3fd453a2c255 ]

Currently, three hardware operations are involved in setting the PVID.
If any operation fails, a failure will be returned. And there may be
residual hardware configurations because no rollback is performed.

This patch adds rollback operation for setting PVID to avoid residual
hardware configuration after the PVID fails to be configured.

Fixes: 411d23b9eafb ("net/hns3: support VLAN")

Signed-off-by: Chengchang Tang <tangchengchang at huawei.com>
Signed-off-by: Min Hu (Connor) <humin29 at huawei.com>
---
 drivers/net/hns3/hns3_ethdev.c | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

diff --git a/drivers/net/hns3/hns3_ethdev.c b/drivers/net/hns3/hns3_ethdev.c
index 315baaa84f..768876d65b 100644
--- a/drivers/net/hns3/hns3_ethdev.c
+++ b/drivers/net/hns3/hns3_ethdev.c
@@ -849,7 +849,7 @@ hns3_vlan_pvid_configure(struct hns3_adapter *hns, uint16_t pvid, int on)
 {
 	struct hns3_hw *hw = &hns->hw;
 	uint16_t port_base_vlan_state;
-	int ret;
+	int ret, err;
 
 	if (on == 0 && pvid != hw->port_base_vlan_cfg.pvid) {
 		if (hw->port_base_vlan_cfg.pvid != HNS3_INVALID_PVID)
@@ -872,7 +872,7 @@ hns3_vlan_pvid_configure(struct hns3_adapter *hns, uint16_t pvid, int on)
 	if (ret) {
 		hns3_err(hw, "failed to config rx vlan strip for pvid, "
 			 "ret = %d", ret);
-		return ret;
+		goto pvid_vlan_strip_fail;
 	}
 
 	if (pvid == HNS3_INVALID_PVID)
@@ -881,13 +881,27 @@ hns3_vlan_pvid_configure(struct hns3_adapter *hns, uint16_t pvid, int on)
 	if (ret) {
 		hns3_err(hw, "failed to update vlan filter entries, ret = %d",
 			 ret);
-		return ret;
+		goto vlan_filter_set_fail;
 	}
 
 out:
 	hw->port_base_vlan_cfg.state = port_base_vlan_state;
 	hw->port_base_vlan_cfg.pvid = on ? pvid : HNS3_INVALID_PVID;
 	return ret;
+
+vlan_filter_set_fail:
+	err = hns3_en_pvid_strip(hns, hw->port_base_vlan_cfg.state ==
+					HNS3_PORT_BASE_VLAN_ENABLE);
+	if (err)
+		hns3_err(hw, "fail to rollback pvid strip, ret = %d", err);
+
+pvid_vlan_strip_fail:
+	err = hns3_vlan_txvlan_cfg(hns, hw->port_base_vlan_cfg.state,
+					hw->port_base_vlan_cfg.pvid);
+	if (err)
+		hns3_err(hw, "fail to rollback txvlan status, ret = %d", err);
+
+	return ret;
 }
 
 static int
-- 
2.31.1

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2021-05-17 17:40:33.142590356 +0200
+++ 0093-net-hns3-fix-rollback-after-setting-PVID-failure.patch	2021-05-17 17:40:29.299810484 +0200
@@ -1 +1 @@
-From 39c4fe7042acaeea7a4dff0213ed3fd453a2c255 Mon Sep 17 00:00:00 2001
+From 979db7ce12639af4a83d881360e019294594e06f Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit 39c4fe7042acaeea7a4dff0213ed3fd453a2c255 ]
+
@@ -14 +15,0 @@
-Cc: stable at dpdk.org
@@ -23 +24 @@
-index a4d17ed0f4..56b3032e6b 100644
+index 315baaa84f..768876d65b 100644
@@ -26 +27 @@
-@@ -981,7 +981,7 @@ hns3_vlan_pvid_configure(struct hns3_adapter *hns, uint16_t pvid, int on)
+@@ -849,7 +849,7 @@ hns3_vlan_pvid_configure(struct hns3_adapter *hns, uint16_t pvid, int on)
@@ -35 +36 @@
-@@ -1004,7 +1004,7 @@ hns3_vlan_pvid_configure(struct hns3_adapter *hns, uint16_t pvid, int on)
+@@ -872,7 +872,7 @@ hns3_vlan_pvid_configure(struct hns3_adapter *hns, uint16_t pvid, int on)
@@ -44 +45 @@
-@@ -1013,13 +1013,27 @@ hns3_vlan_pvid_configure(struct hns3_adapter *hns, uint16_t pvid, int on)
+@@ -881,13 +881,27 @@ hns3_vlan_pvid_configure(struct hns3_adapter *hns, uint16_t pvid, int on)